David Gergen: “I think it's the clearest rebellion we've had all season, the biggest anti-establishment vote that's occurring against…”

If he comes out and throws cold water on this, then I don't think it goes anywhere.

It's very, very big. Not legally, but politically, it's a very, very big deal.

I don't think Trump is out of the woods, even though his poll numbers are not only staying up, they have actually been strengthened some.

I think a lot of Americans do see it as disqualifying. And they're worried about it.